Holmia

Holmia is a genus of a well known group of extinct arthropods, the trilobites, that lived during the Lower Cambrian (Atdabanian) in what are now Scandinavia, Poland and Morocco.

Holmia

Johan Kiaer (1916) · Public Domain · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.

On record

Recorded, not inferred
Sits inside
HolmiidaePBDB
Diet
deposit feederPBDB, for Redlichiida
Life habit
low-level epifaunalPBDB, for Redlichiida
Motility
fast-movingPBDB, for Redlichiida
Vision
well-developedPBDB, for Holmiidae
Environment
marinePBDB, for Trilobita

Time the record covers

At least 3.9 million years on record.

The record covers at least 516 Mya to 512.1 Mya. No occurrence read is dated outside 538.8 Mya to 506.5 Mya.

Cambrian — about 13 of 13 occurrencesCambrian539–538 Mya — about 0.0 occurrences538–537 Mya — about 0.1 occurrences537–536 Mya — about 0.1 occurrences536–535 Mya — about 0.1 occurrences535–534 Mya — about 0.1 occurrences534–533 Mya — about 0.1 occurrences533–532 Mya — about 0.1 occurrences532–530 Mya — about 0.1 occurrences530–529 Mya — about 0.1 occurrences529–528 Mya — about 0.1 occurrences528–527 Mya — about 0.1 occurrences527–526 Mya — about 0.1 occurrences526–525 Mya — about 0.1 occurrences525–524 Mya — about 0.1 occurrences524–523 Mya — about 0.1 occurrences523–522 Mya — about 0.1 occurrences522–520 Mya — about 0.7 occurrences520–519 Mya — about 1 occurrence519–518 Mya — about 1 occurrence518–517 Mya — about 1 occurrence517–516 Mya — about 1 occurrence516–515 Mya — about 0.7 occurrences515–514 Mya — about 0.8 occurrences514–513 Mya — about 0.8 occurrences513–511 Mya — about 0.8 occurrences511–510 Mya — about 0.8 occurrences510–509 Mya — about 0.8 occurrences509–508 Mya — about 0.8 occurrences508–507 Mya — about 0.2 occurrences507–506 Mya — about 0.1 occurrences516 Mya – 512.1 Mya539.4 Mya505.9 Mya

13 occurrences of Holmia on record, most of them in the Cambrian. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.

When

13 occurrences

These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.

Found in

9 formations

Ringstrand — 60.90°N, 10.73°ERingstrand — 60.95°N, 10.78°EOcieseki Sandstone — 51.00°N, 20.00°EOcieseki Sandstone — 50.75°N, 20.97°EIssafen — 31.21°N, 7.88°WGislov — 55.52°N, 14.35°EBråstad Shale — 60.73°N, 10.34°EHolmia Shale — 60.91°N, 10.73°EEvjevik Limestone — 60.91°N, 10.73°EGrammajukku — 64.61°N, 18.19°ESekwi — 63.33°N, 130.48°W

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The named rock units Holmia has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Holmia and its relatives

Cambrian

Where Holmia and its relatives were recorded in the Cambrian.

Found in the same rock

58 taxa

The Paleobiology Database records 11 sites for Holmia, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.

This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.

Entered from

10 references

Each of the 13 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content2

Picture of Holmia

Credit
Johan Kiaer (1916)
Licence
Public Domain
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial
Commercial use
the licence does not allow it

The description on this site

Licence
CC BY-SA 4.0

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itHolmiidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Matthew 1890)